Baretti: A dictionary of the English and Italian languages
Pópp-a, s. f. dim. Pópp-ellína, disp. Pópp-áccia,
1. a woman's breast, teat. Dar —, to milk, suckle. Levare dalla —, to wean; 2. teat, dug; 3. breast; 4. (met.) a flask of wine; 5. a grape;6. poop, stern of a ship. Aver il vento in —,to sail with a fair wind, to succeed. Volger la —, to change one's state or condition.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
poppa: a teat, a pap, a dug, an vdder. Also the poupe of a ship.